Pulp-screen



(NoMoael.)

E. M. HALL 8v F. PEARSE.

PULP SCREEN.

Pate'ntedfJune 12, 1894.

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EDWARD M. HALL AND FRANK PEARSE, OF DEXTER, NEW YORK.

PULP-SCREEN.

SPECIFICATION forming part of Letters Patent No. 521,409, dated June 12,1894. Application filed January 11, 1894. Serial No.4961529- (N modeL) vTo all whom t may concern,.- A l Be it known that we, EDWARD M. HALL andFRANK PnARsE, citizens of the United States of America, residing atDexter, in the county of Jefferson and State of New York, have inyentedcertain new and useful Improvements 1nPulp-Screens5 and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable oth# ers skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters .of reference marked thereon,which form a part of this specication.

This invention relates to improvements in pulp-screens; and it consistsin providing the diaphragm of a pulpscreen with springs which areadapted to move said diaphragm against the action of the cams on theoperatzo ing shaft, the springs extending across the diaphragm so as tobear upon the side pieces of the frame of the pulp-screen.

In the accompanying drawings, forming part of this specification, Figure1 is a side z 5 view of a pulp-screen,.partly in section, showing ourimprovements applied thereto. Fig.

2 is a sectional view on the line 2-2 of Fig.

l, and Fig. 3 is a detail plan view, a part of the screen-plate beingbroken away.` 3o@ A designates the base of the pulp-screen, the

frame B of which is provided with a suitable trough B and with a seriesof transverse beams B2 which form supports for the diaphragm on eachside of the compartments'of 3 5 the pulp-chamber. Upon the frame B issecured the diaphragm D, which is ,of suitable ileXible material, andacross this diaphragm between the transverse beams B2 are locatedsprings E, and upon these springs are attached 4o plates e against whichthe cams c on the operatingshaft C bear. On the under side of thediaphragm beneath the springs are attached reinforcing strips e. Thesprings E and reinforcing strips e and e are connected to the 'diaphragmby bolts or rivets e2.

F designates the upper frame of the pulpscreen to the side pieces ofwhich are attached transverse partitions F which divide the pulp-chamberG into a series of compartments 5o g; these partitions lie immediatelyabove the transverse beams B2 and through the same passes the operatingshaft O. The inner sides Fis connected to the frame B in any suitablemanner, preferably by bolts so that the parts can be securely connectedtogether.

" Each compartment of the pulp-chamber has an outlet opening g whichcommunicates with the trough Bf.

Inoperatin thepulp is fed into the pulp screen above the perforatedscreen-plate H and the shaft is driven so as to vibrate the diaphragmewhich will cause the .pulp to be drawn through theperforatedscreen-plate into the compartments of the pulp-chamber and it then iindsits way to the trough B from which it may be conveyed to a suitabledischarge pipe.

It will be noted that the diaphragme are partially supported by thesprings, and that they are alternately vibrated, the cams being indierent positions upon the shaft.

A pulp-screen constructed as herein shown VVand described may be set upto occupy but little space, and in operation Will agitato the pulp abovethe screen-plate so as to render the straining positive and effective.

We are aware that prior to our invention it has been proposed to providea paper pulpscreen with a straining plate below which is located adiaphragm, said diaphragm being adapted to be vibrated by a shaft havingcamdisks, and We do not claim such construction broadly; but

What We do claim as new, and desire to secure by Letters Patent, is-

l. In a pulp-screen, the combination, with a base having a diaphragm andtransverse springs connected thereto, of a shaft having cams forvibrating the diaphragms, the shaft and cams carried thereby beingwithin the pulpchamber, substantially as described an for the purposeset forth.

2. In a pulp-screen constructed substantially as described, thecombination, of the dia- IOC phragms having springs and bearing-p1atesattached above said springs, ot ashaft mounted above the diaphragms andbelow the screen-plate, said shaft having cams which are adapted to bearupon the bearing-plates, substantiaily as described and for the purposeset forth.

3. In a pulp-screen, the combination, of a base constructedsubstantially as described and provided with transverse beams B2,diaphragms connected to said base and provided with springs,bearing-plates e attached to the springs and reinforcing Strips 'e'attached on BURT W. Woon, O. M. Woon.

